Adam Clarke on Daniel 6:14

The king - was sore displeased with himself - And well he might, when through his excessive folly he passed a law that, for its ostensible object, would have been a disgrace almost to an idiot.

And set his heart on Daniel - He strove by every means to get the law annulled. He had no doubt spoken to several of his lords in private, and had gone from one to another till the going down of the sun.